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Finding the Fourth Proportional to 13,898.00, 20,820.84 and 6,869.79

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Solution

The fourth proportional to 13,898.00, 20,820.84 and 6,869.79 is: 10,291.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,898.00 : 20,820.84 = 6,869.79 : x
  2. Step 2: Convert to fraction form
    13,898.00/20,820.84 = 6,869.79/x
  3. Step 3: Cross multiply
    13,898.00x = 20,820.84 × 6,869.79
  4. Step 4: Simplify right side
    13,898.00x = 143,034,700.83
  5. Step 5: Solve for x
    x = 143,034,700.83/13,898.00
  6. Step 6: Final answer
    x = 10,291.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.